Add extensions construction support

Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/ssl_err.c

diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
index b59da2b..b5b9857 100644
--- a/ssl/ssl_err.c
+++ b/ssl/ssl_err.c
@@ -275,6 +275,7 @@
      "tls_construct_client_verify"},
     {ERR_FUNC(SSL_F_TLS_CONSTRUCT_ENCRYPTED_EXTENSIONS),
      "tls_construct_encrypted_extensions"},
+    {ERR_FUNC(SSL_F_TLS_CONSTRUCT_EXTENSIONS), "tls_construct_extensions"},
     {ERR_FUNC(SSL_F_TLS_CONSTRUCT_FINISHED), "tls_construct_finished"},
     {ERR_FUNC(SSL_F_TLS_CONSTRUCT_HELLO_REQUEST),
      "tls_construct_hello_request"},
@@ -292,6 +293,10 @@
     {ERR_FUNC(SSL_F_TLS_GET_MESSAGE_HEADER), "tls_get_message_header"},
     {ERR_FUNC(SSL_F_TLS_PARSE_CLIENTHELLO_KEY_SHARE),
      "tls_parse_clienthello_key_share"},
+    {ERR_FUNC(SSL_F_TLS_PARSE_CLIENTHELLO_RENEGOTIATE),
+     "tls_parse_clienthello_renegotiate"},
+    {ERR_FUNC(SSL_F_TLS_PARSE_CLIENTHELLO_TLSEXT),
+     "tls_parse_clienthello_tlsext"},
     {ERR_FUNC(SSL_F_TLS_PARSE_CLIENTHELLO_USE_SRTP),
      "tls_parse_clienthello_use_srtp"},
     {ERR_FUNC(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO),
@@ -336,6 +341,8 @@
     {ERR_FUNC(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE),
      "tls_process_ske_psk_preamble"},
     {ERR_FUNC(SSL_F_TLS_PROCESS_SKE_SRP), "tls_process_ske_srp"},
+    {ERR_FUNC(SSL_F_TLS_SCAN_CLIENTHELLO_TLSEXT),
+     "tls_scan_clienthello_tlsext"},
     {ERR_FUNC(SSL_F_USE_CERTIFICATE_CHAIN_FILE),
      "use_certificate_chain_file"},
     {0, NULL}